Wrench



Oct. 10, 1944. Y. A. BOUGET 2,359,823

I WRENCH Filed Dec. 13, 1941 5 Sheets-Sheet l INVENTOR K A.BOU6'ET QRE-W M Oct. 10, 1944. Y, A QQUGET 2,359,823

WRENCH Filed Dec. '13, 1941 3 Sheets-Sheet 2 MAW/M I'IIA INVEN TOR IKABOUGE 'r A rroklwsr Oct. 10, 1944. Y.IA. BOUGET WRENCH Filed Deb. 13,1941 3 Sheets-Shegt 5 0 I a I F FIG.

INVENTOR KA. 300657 ZRflWJ-M v ATTORNEY Patented Oct. 10, 1944 WRENCHYves A. Bouget, West Orange, N. J., assignor to Western ElectricCompany, Incorporated, New York, N. Y., a corporation of New YorkApplication December 13, 1941, Serial No. 422,840

14 Claims.

This invention relates to wrenches, and more particularly to apparatusfor separating threaded inserts from molded telephone key handles.

In the molding of plastic articles with internal threads, the moldsfrequently include threaded elements serving to form threads in themolded articles. Such threaded articles must of necessity be removedfrom the molded articles and it has been deemed advantageous to removethe elements from the molded articles before the articles have hadsufficient time to cool and shrink on the elements.

An object of the invention is toprovide a wrench which is simple instructure and highly efiicient in operation, to cause relative rotationof articles.

With this and other objects in View, one embodiment of the inventioncomprises a wrench for threadedly connected articles including membersto grip one of the articles and position the article, threadedlyconnected thereto, relative to a driven unit, the latter being renderedefiective through movement of the gripping members to cause relativerotation of the articles.

Other objects and advantages will be apparent from the followingdetailed description when taken in conjunction with the accompanyingdrawings, wherein Fig. l is a vertical sectional view of the wrench,portions thereof being shown in elevation;

Fig. 2 is a substantially horizontal sectional view taken along the line22 of Fig. 1;

Fig. 3 is a top plan view of the wrench;

Fig. 4 is a fragmentary sectional View taken along the line 4-4 of Fig.3;

Fig. 5 is an enlarged fragmentary detailed view of a rotary portion ofthe wrench;

Fig. 6 is an enlarged fragmentary top plan view of a portion of thearticle holding structure;

Fig. 7 is a vertical sectional View taken along the line 1-! of Fig. 6;

Fig. 8 is a front elevational View of the threadly connected articles,one of which is shown in section;

Fig. 9 is a fragmentary detailed View of another embodiment of therotary portion of the wrench; and

Figs. 10 and 11 are fragmentary detailed views of another embodiment ofthe rotary portion of the wrench.

Referring now to the drawings, attention is first directed to Figs. 1, 2and 3, which illustrate a, housing 10, of the contour illustrated,including a cover member ll forming the upper wall of the housing. Themember ll is bent through an arc, at l2, extending downwardly, providinga supporting wall l4 extending at an angle from a horizontal plane butat right angles with respect to the portion covering the housing, thismember then extending through an arc l5 and 3 providing a base portionl6. Spaced uprights ll extend from the side of the base portion Hi topoints at the housing Ml, where they are secured, these uprights servingas reenforcing means for the housing. I

A motor 20 is mounted upon the wall M of the member I l, as illustratedin Fig. 1, the motor having a shaft 2! extending into the housing it andprovided with a pulley 23 fixed for rotation therewith. At the curvedportion l2 of the member l l, an opening is provided for the mounting ofa switch housing 23, a switch 24 being mounted therein and controlled bya switch handle 25. Theswitch 24 is disposed in an electrical circuit(not shown) including the motor 28, the switch controlling the circuitto effect starting and stopping of the motor and if desired, reversingof the motor.

A belt 28 for the motor pulley 22 extends around a wrench pulley 29, thelatter having a hub disposed concentric with a bearing 30. The bearingis supported in an annular member 3|, the latter extending through anopening 33 in the member H and fixed t o-a shiftable plate 34 bysuitable means such as screws 35.

The shiftable plate 34 is. circular in general contour except for anintegral projection 36 which is apertured to receive a pivot element 31which is in the form of, a bolt. Furthermore, a handle 38 is fixed tothe plate 34 at a portion diametrically opposed the integral projection36. Through the aid of the handle 38, the plate 34 may be shifted fromone position to another, these positions being called operative andinoperative positions due to the fact that the belt 28 is tightened onthe pulley 29 in the operative position and made loose on the pulleywhenin the inoperative position. The opening 33 in the cover member H isof sufficient size to allow movement of the annular member 3;! thereinfrom one position to the other. A pin 40 carried by the annular memberBI, is positioned to ride on the under surface of the wall member Htoserve in guiding the shiftable mechanism of the wrench.

An annular cam 43, with 'rollerreceiving compartments 44 (Fig. 5)therein of the contours shown, is disposed concentric with the pulley29.

The compartments 44 have cam-like surfaces 45 adjacent which grippingrollers 46 are disposed. The rollers a well as the compartments aredisposed at equally spaced positions about the center of the cam 43,each roller having a compres- SiOn spring 41 tending to move it inwardlyto a position where it is under the control of the cam. The springs 41are housed in apertures 48 in the cam and are removably held in place byscrews 49. The rollers 46 have reduced end members 58 which are disposedin elongate apertures 51 of control members 52 and 53, these membersbeing disposed upon each side of the cam 43 and secured with the cam tothe pulley 29 by the aid of rivets 54. Therefore, the cam with therollers and the controlling members are rotated with the pulley 29.

- When the plate 34 of the associated mechanism is in the inoperativeposition, the pulley 29 is positioned in engagement with a stationarybrake member 56, the forward portion of which is of a contour tointerengage the groove of the pulley to create a. sufficient frictionalforce to stop rotation of the pulley. The brake member 56 is adjustablebetween stationary guides 51 (Fig. 2) and secured in any desiredadjusted position by means of a screw 58, the latter extending throughan elongate opening 59 in the lower portion of the housing I6.

Attention is now directed to another aperture 68 in the lower wall ofthe housing adjacent the pulley 29, the latter having an opening 6!therethrough so that articles may drop through the opening 6! in thepulley, the aperture 68 in the housing, and into a container 62supported by the base portion 16.

In the present embodiment the articles for which the wrench wasdesigned, include a plastic handle 65 (Fig. 6) molded in a suitable mold(not shown), a portion of which, however, is an element 65 having athreaded portion 61, the purpose of the latter being to form internalthreads in the handle 65 during the molding process. A locating element68, extending vertically from an integral base 69, has a surface 10 of acontour conformin to the article 65, for the purpose of locating thearticle, with'the element 66 thereattached, in the rotary unit of thewrench. The base 69 of the locating element is annular in generalcontour and is disposed in a circular recess in 'the plate 34, where itis secured in place, the central aperture of the base member allowingthe element 66 to project therethrough as illustrated in Fig, 1.

Means is provided to 'grip the article 65 and to hold the articleagainst rotation during rotation of the cam 43 and the associatedmechanism, to cause removal of the element from the article. This meansincludes a pair of arms 1! pivotally supported upon the pivot element 31and having supporting members 12. The supporting members 12 haveopposing guideways 13 therein to receive companion gripping elements 14,the latter recessed at 15 to receive the article 65 and normally held inplace by spring pressed plungers 16. The gripping elements 14, whengripping the article 65, will be spaced a sufficient distance apart toallow for the locating element 68. Each arm 1! is provided with a handle11 arcuate-shaped in cross section to conform to the handle 38 which iscircular in cross section. The arms H are normally urged outwardly byspring pressed ball members 18, the latter receiving their force from acommon spring 19 housed in a member 80 mounted upon the plate 34. Thearms 11 are further under the control of a transverse member BIextending across the arms, to allow movement of the arms away from eachother but to limit such movement. The ends of the member 81 aresupported by spacing members 82 through the aid of screws 83 threadedlyconnected to the plate 34.

An air controlled valve 84 is mounted upon the housing and includes aplunger 85 positioned to be actuated by the adjacent arm 11 when thelatter is in its open or normal position. The adjacent arm thusfunctions to open the Valve, which is in an air line 86, to allow airunder pressure to pass through an air line 81 and a nozzle 88 againstthe article 65, to blow the article free of the wrench when released bythe gripping elements 14, it having been freed of its element 66. Thenozzle 88 is supported by a bracket 89 mounted on the member 81, the airline 81, or a portion thereof, being flexible to allow movement of thenozzle 88 with the other movable structure about the pivot 31.

During the operation of the apparatus, the arms 1| are normally in theiroutward positions (see dot-dash lines in Fig. 3) and are located withthe plate 34 and the associated mechanism in the inoperative position.In this position the pulley 29 engages the brake member 56 to hold therotatable wrench mechanism against rotation. At this time, the article65 with the element 66 thereattached, may be located in the wrenchthrough the aid of the locating element 68, the element 66 having beenlowered through the aligned apertures of the base 69, the members 52 and53, and the cam 43, the lower end of the element 66 extending into thecentral opening 6| of the pulley 29. When the article 65 with itselement65 are thus disposed in the wrench, the operator may grip the handles 11to move the arms 1| about their pivot 31 toward each other, to bring thegripping elements 14 into the positions where the recesses 15 thereofwill receive the article and grip the article to hold it againstrotation. The gripping of the article causes partial compression of thesprings, backing the. plungers 16, effecting frictional holding of theelements in their normal lower positions, yet permitting upward movementof the elements. The handles 11 are thus disposed adjacent the handle38, making it possible for the operator to move the plate 34 with thearms 1| about the pivot element 31, into the operating position.

Due to the fact that the pivot element 31 is disposed ofi center withrespect to the motor shaft 2|, the pulley 29 is moved through an areaway from the pulley 22, resulting in the tightening of the belt 28 tooperatively connect the rotatable portion of the Wrench mechanism withthe power means, namely the motor. The tightening of the belt 28 on thepulleys 22 and 29 effects rotation of the pulley 29 in a clockwisedirection (Fig. 2), rotating with the pulley the cam 43 and the controlmembers 52 and 53. The rotative force of the cam 43urges the rollers 46into engagement with the element 66. The resisting force of the element66, due to its threaded connection with the article 65, tends toincrease the gripping force between the rollers and the element throughthe cooperation of the cam-like surfaces 45, resulting in rotation ofthe element with the cam. It is, therefore, apparent that through theassistance of the springs 41 in positioning the rollers, and therelationship of the cam surfaces 45 with the rollers, the greater theholding force between the element 66 and its article 65, the greaterwill be the gripping force between the rollers and the element to efiectrotation of the element. This effect continues during the unscrewing ofthe element from th article and due to the fact that the article is heldagainst movement, the element is forced downwardly in a self-ejectingaction so as to drop freely from the rollers 46 and through the opening6| in the pulley 29, once the driving force has terminated. In otherWords, the positive downward force of the unscrewing action actingagainst the less positive frictional holding of the roller action,causes downward ejection of the element 66. Furthermore, the grippingforce on the element is proportional to the amount of turning resistanceoffered and this gripping force releases as soon as the resistance tothe the wrench to the inoperative position, moving the rotating pulley29 into engagement with the brake 56, effecting stopping of the pulleytogether with the associated mechanism including the cam 43 and therollers. The operator may then release the handles and in doing so, thespring 19 will be rendered effective to move the ball members I8outwardly, spreading the handles to their normal positions to free thearticle 65 and to actuate the plunger 85 of the valve 84, to cause a jetof air under pressure to force the article free. The plunger 85 of thevalve may be so positioned that it will be operated prior to thecomplete releasing of the article by the gripping elements I4.

It will, therefore, be apparent, by viewing the drawings, that byplacing the article 65, with an element 66 attached, in the positionshown in Fig. 1, the article will be automatically located by thelocating element 68, at which time the operator may grip the threehandles, that is the pair of handles 11 and the handle 38, this grippingaction closing the arms to cause the gripping element 14 to grip thearticle. After the operator has gripped the handles he then moves thehandles clockwise a distance determined by the resistance caused by thetightening of the belt. The time necessary to hold the handles in thelast mentioned position may be determined by the dropping of the element66 into the container or by the estimated time necessary for the removalof the element. Thus the operator, after locating the article with theelement, need only grip the handles, moving the handles into operatingposition, hold them there for a predetermined length of time, and returnthe handles to the normal position, where they are released. This actioncauses first the gripping of the article and then effects rotation ofthe rotatable mechanism of the wrench, including the cam 43 and itsrollers 46, to unscrew the element from the article, which actioneffects simultaneous ejection of the element from the rotatable means ofthe wrench. Furthermore, the operator need not wait after each operationfor the rotatable means of the wrench to idle to a stop, this mechanismbeing stopped almost instantaneously by the brake 56 when the pulley 29is moved into engagement therewith. During normal operations, after thefirst relative movement of the article 65 and its element 66 when themaximum force is required to break the hold of the threaded connectiontherebetween, but little force is required to hold the element forcontinued rotation thereof. However, occasions may arise when thethreaded connection may be tight all the way through the operation. Insuch instances the maximum holding force of the rollers on the element66 would tend to oppose the ejecting movement of the element. At suchtimes the gripping elements 14 may move upwardly with the article 65against the holding force of-the spring pressed plungers l6.

The embodiment of the invention thus described relates to the separatingof two threadedly connected parts. If desired, the apparatus mayfunction to threadedly connect two parts. The only change necessary tocondition the Wrench for this purpose is to make it possible for therotation of the rotatable mechanism of the wrench in the oppositedirection and the conditioning of the cam and the rollers to grip one ofthe parts when rotated in the said direction. This may be accomplishedby reversing the direction of rotation of the motor. If the motor is ofthe reversible type the switch 24 may also be of the type to effect suchreversal of the motor. Therefore, the change in the cam may be asillustrated in Fig. 9. In this figure a cam is shown with recesses 9|,to receive rollers 9.2 having reduced ends 93 which may also becontrolled by members with elongate or similarly-shaped apertures, suchas the members 52 and 53. In the recesses 9| there are cam surfaces 94and '95 adapted to cause movement of the rollers toward the axis of thecam when the cam is rotated in either direction. Furthermore, each camroller is provided with a pair of springs 96 of the compression type,each functioning to assist the roller for movement on its respective camsurface to effect gripping of the element depending upon the directionof rotation of the cam. Therefore, with the cam 90 and its rollers 92substituted for the cam 43 and its respective rollers, the wrench wouldbe conditioned to effect rotation of an element relative to an articlein one direction, to threadedly connect the element with the article orto rotate the element inthe opposite direction, to accomplish the sameresult which is possible with the cam 43, namely the separating of thethreadedly connected element and article. In either case, the grippingforce of the rollers on the element will vary with variations in theforce necessary to cause rotation of the element relative to thearticle, the maximum force usually being required at the 'beginning ofthe separating operation and at the end of the assembling operation. Atother times the gripping force is automatically reduced to allow axialmovement of the element either for assembly with the article or forejection therefrom.

The embodiment of the invention shown in Figs. 10 and 11 includes astructure which may be substituted for the annular cam 43, its rollers46 and the control members 52 of the structure shown in Figs. 1 and 5.In the structure shown in Fig. 10, a cam I60 has a plurality of radiallydisposed recesses llll which are identical in structure and providecam-like surfaces I02. Rollers I03, substantially identical in structureto the rollers 46, are disposed in the recesses and ing disposed inelongate apertures I of control members I06. Fig. 11, which is takenalong the line IIII of Fig. 10, illustrates the control members I06disposed one upon each side of the cam I00, these members being securedtogether by connecting rods I01 spaced radially about the centers of thecontrol members and extending through their respective recesses IOI inthe cam. The outer ends of the connecting rods I01 are riveted in placeto their respective control members, the portions of the rods disposedin the recesses of the cam bein flattened, as shown in Fig. and furtherillustrated in Fig. 11, so as to allow room for their respective-rollersI03 to rotate freely. A helical compression spring I08 is provided foreach of the connecting rods I07, these springs being disposed in theirrespective apertures I09 formed in the cam I00 and held in place byscrews IIO, the inner ends of the springs abutting against theirrespective connecting rods. Annular members III and H2, centrallyapertured to receive the control members I06 for rotation of the controlmembers therein, are disposed upon their respective sides of the camI00. Sets of aligned apertures are provided in the cam I00 and themembers II I and H2, to receive rivets II 4, similar in structure to therivets 54 (Fig. 1), for the purpose of securing the structure to thepulley 29.

With the operation of the structure shown in Fig. 1 in mind, the sameoperations may be performed should the structure shown in Figs. 10 and11 be substituted for the aforementioned cam 43, members 52 and 53 andthe rollers 46. The distinguishing differences between the twostructures, that shown in Fig. 1 and the embodiment shown in Figs. 10and 11, lie in the controlling of the rollers shown in the twoembodiments. With the structure shown in Fig. 1, the rollers 46 may gripelements of varying contours and if desired, these rollers, instead ofbeing truly cylindrical, may be suitably convexed to assure gripping ofarticles of varying contours. The structure shown in Figs. 10 and 11 wasparticularly designed to maintain the axes of the rollers in parallelplanes to assure contact of the rollers for their full length with acylindrical element, and to further maintain the axes of the rollers inplanes parallel with the axis of the element. This is assured throughthe positioning of the apertures I05, they extending toward the centerof the cam, their positions being substantially radial therefrom.Another important function lies in the maintaining of the rollers atequally spaced positions about an element to be associated therewith, tofurther maintain the axis of the element parallel with the axes of therollers by assuring contact of the rollers at equally spaced positionsabout the element. Therefore, due to the fact that the rollers can onlymove substantially radially with respect to the center of the cam, thecontrol members I06 must be adapted to move about the axis of the camand relative to the cam to bring about the gripping and releasing of therollers with respect to the element or article they are gripping. Thesprings I08 function similarly to the springs 4'! to locate the rollersso that they may grip an element through their association with theirrespective cam surfaces I02 when an element is disposed between therollers and the apparatus is set in operation. In the structure shown inFigs. 11 and 12, the springs do not contact the rollers but engage theconnecting rods provided with reduced ends I04, these ends be- I01 andcontrol the rollers, through the control members I06, and apertures I05functioning to move the rollers simultaneously, keeping them equallyspaced about the element yet allowing movement toward or away from theelement as controlled by their respective cam surfaces.

Although specific improvements of the invention have been shown anddescribed it will be understood that they are but illustrative and thatvarious modifications may be made therein without departing from thescope and spirit of this invention as defined by the appended claims.

What is claimed is:

1. A wrench, for separating articles having threadedly connectedportions, comprising a unit mounted for rotation and for movement from aloading position to an operating position, gripping elements actuable tohold one of the articles against rotation and support the other articlein the unit, means at the operating position to cause rotation of theunit, and means in the unit to engage the article therein and causerotation thereof with the unit to effect separation of the articles.

2. A wrench, for separating articles having threadedly connectedportions, comprising a unit mounted for rotation and for movement from aloading position to an operating position, gripping elements actuable tohold one of the articles against rotation and support the other articlein the unit, means at the operating position to cause rotation of theunit, means in the unit to engage the article therein and cause rotationthereof with the unit to efiect separation of the articles, and means atthe loading position to stop rotation of the unit.

3. A wrench, for separating articles having threadedly connectedportions, comprising a unit mounted for rotation and for movement from aloading position to an operating position, gripping elements actuable tohold one of the articles against rotation and support the other articlein the unit, means at the operating position to :cause rotation of theunit, and means in the unit rendered effective upon rotation thereof toengage the article therein and cause rotation of the said article withthe unit to effect separation of the articles.

4. A wrench, for separating articles having threadedly connectedportions, comprising a unit mounted for rotation and for movement from aloading position to an operating position, gripping elements actuable tohold one of the articles against rotation and support the other articlein the unit, means at the operating position to cause rotation of theunit, means in the unit to engage the article therein and cause rotationthereof with the unit to effect separation of the articles, and means tocause movement of the unit from one position to the other.

5. A wrench, for separating articles having threadedly connectedportions, comprising a unit mounted for rotation and for movement from aloading position to an operating position, gripping elements actuable tohold one of the articles against rotation and support the other articlein the unit, means at the operating position to cause rotation of theunit, means in the unit to engage the article therein and cause rotationthereof with the unit to effect separation of the articles, and means tocause simultaneous movement of the gripping elements and the unit fromone position to the other.

6. A wrench comprising a unit mounted for rotation and for movement froma loading position to an operating position, actuable means in the unitadapted to receive a threaded article at the loading position and causerotation of the article at the operating position, gripping elementsactuable to hold another threaded article against rotation with thearticle in the unit, means to move the elements and the unit to move theheld articles simultaneously from the loading position to the operatingposition, and means at the operating position to cause rotation of theunit and actuation of the said actuable means to cause separation of thearticles.

7. A Wrench comprising a unit mounted for rotation and for movement froma loading position to an operating position, actuable means in the unitadapted to receive a threaded article at the loading position and causerotation of the article at the operating position, gripping elementsadapted to hold another threaded article against rotation with thearticle in the unit, means to move the elements and the unit to move theheld articles simultaneously from the loading position to the operatingposition, and means at the operating position to cause rotation of theunit in either direction to cause assembly or separation of thearticles.

8. A wrench, for separating first and second articles having threadedlyconnected portions, comprising a rotatable unit having a centralaperture for receiving the first article, gripping rollers spaced aboutthe aperture, and cam portions adapted to cause the rollers to movetoward and grip the first article when the unit is rotated, grippingelements actuable to hold the second article against rotation and locatethe first article in the aperture of the unit in a position to begripped by the rollers, means to cause rotation of the unit to causeseparation of the articles, and means to support the gripping elementsfor movement thereof relative to the unit by the relative movement ofthe articles while being separated.

9. A wrench, for separating first and second articles having threadedlyconnected portions, comprising a rotatable unit having a centralaperture for receiving the first article, gripping rollers spaced aboutthe aperture, and cam portions adapted to cause the rollers to movetoward and grip the first article when the unit is rotated, grippingelements actuable to hold the second article against rotation and locatethe first article in the aperture of the unit, means to cause rotationof the unit to cause separation of the articles, and means to normallysupport the gripping elements at locating positions and adapt theelements for movement away from the said positions by the second articleduring separation of the articles.

10. A wrench, for separating first and second articles having threadedlyconnected portions, comprising a rotatable unit having a centralaperture for receiving the first article, gripping rollers spaced aboutthe aperture, and cam portions adapted to cause the rollers to movetoward and grip the first article when the unit is rotated, grippingelements actuable to hold the second article against rotation and locatethe first article in the aperture of the unit, supports for the grippingelements movable relative to each other to move the elements intogripping relation with the second article at a loading position andadapted to move the elements, articles and rotatable unit to anoperating position, and means at the operating position to rotate theunit to cause separation of the articles.

11. A wrench, for separating first and second articles having threadedlyconnected portions, comprising a rotatable unit having a centralaperture for receiving the first article, gripping rollers spaced aboutthe aperture, and cam portions adapted to cause the rollers to movetoward and grip the first article when the unit is rotated, grippingelements actuable to hold the second article against rotation and locatethe first article in the aperture of the unit, supports for the grippingelements movable relative to each other to move the elements intogripping relation with the second article at a loading position andadapted to move the elements, articles and rotatable unit to anoperating position, means at the operating position to rotate the unitto cause separation of the arficles, and means at the loading positionto stop rotation of the unit.

12. A wrench, for separating first andsecond articles having threadedlyconnected portions, comprising a rotatable unit having a centralaperture for receiving the first article, gripping rollers spaced aboutthe aperture, and cam portions adapted to cause the rollers to movetoward and grip the first article when the unit is rotated, grippingelements actuable to hold the second article against rotation and locatethe first article in the aperture of the unit, supports for the grippingelements movable relative to each other to move the elements from openpositions into gripping engagement with the second article, means tocause rotation of the unit to cause separation of the articles, andmeans actuated by one of the supports when the elements are in theiropen positions to eject the articles.

13. A wrench, for separating first and second articles having threadedlyconnected portions, comprising a rotatable unit having a centralaperture for receiving the first article, gripping rollers spaced aboutthe aperture, and cam portions adapted to cause the rollers to movetoward and grip the first article when the unit is rotated, grippingelements actuable to hold the second article against rotation and locatethe first article in the aperture of the unit, supports for the grippingelements movable relative to each other to move the elements from openpositions into gripping engagement with the second article, means tonormally urge the supports and elements into the open positions, andmeans to cause rotation of the unit to cause separation of the articles.

14. A wrench, for separating first and second articles having threadedlyconnected portions, comprising a rotatable unit having a centralaperture for receiving the first article, gripping rollers spaced aboutthe aperture, and cam portions adapted to cause the rollers to movetoward and grip the first article when the unit is rotated, grippingelements actuable to hold the second article against rotation and locatethe first article in the aperture of the unit, supports for the grippingelements movable relative to each other to move the elements from openpositions into gripping engagement with the second article, means tonormally urge the supports and elements into the open positions, meansto cause rotation of the unit to cause separation of the articles, andmeans rendered effective by the returning of the supports to the normalpositions to cause ejection of the second article;

YVES A. BOUGET.

